JP2575225B2 - Magnetic recording media - Google Patents
Magnetic recording mediaInfo
- Publication number
- JP2575225B2 JP2575225B2 JP2099708A JP9970890A JP2575225B2 JP 2575225 B2 JP2575225 B2 JP 2575225B2 JP 2099708 A JP2099708 A JP 2099708A JP 9970890 A JP9970890 A JP 9970890A JP 2575225 B2 JP2575225 B2 JP 2575225B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- recording
- magnetic recording
- recording medium
- fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、高密度磁気記録装置（高密度光磁気記録装
置を含む。）に用いる記録媒体に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium used for a high-density magnetic recording device (including a high-density magneto-optical recording device).
従来の技術 従来の磁気記録装置は、磁気記録媒体表面に対し任意
のギャップでもって記録読取用ヘッドを配し、走査によ
って情報を記録したり読取るものであり、高密度記録を
達成しようとすれば、ギャップをできるだけ小さくする
必要があるものである。2. Description of the Related Art In a conventional magnetic recording apparatus, a recording / reading head is arranged at an arbitrary gap with respect to the surface of a magnetic recording medium to record or read information by scanning. It is necessary to make the gap as small as possible.
発明が解決しようとする課題 ところが前記ギャップを小さくするとヘッドと磁気記
録媒体表面がぶつかりドライブ時に装置が破壊されてし
まうので、ギャップを小さくすることにも限界があり、
高密度記録用としては性能が不十分であった。Problems to be Solved by the Invention However, when the gap is reduced, the head and the magnetic recording medium surface collide and the device is destroyed at the time of driving.
The performance was insufficient for high density recording.
又磁気記録媒体の記録層とヘッドの記録あるいは読取
部との距離をできるだけ小さくするためには、記録層の
上に形成する保護膜や潤滑性を与えるための滑剤をでき
るだけ薄く塗布する必要がある。In order to minimize the distance between the recording layer of the magnetic recording medium and the recording or reading portion of the head, it is necessary to apply a protective film formed on the recording layer and a lubricant for providing lubricity as thinly as possible. .
ところが、保護膜形成や滑剤の塗布は、薄くするほど
不均一になり十分な耐久性が得られ無くなるという問題
点があり、十分な信頼性を得ることと高密度化とは相反
するものであった。However, there is a problem that the thinner the thickness of the protective film and the application of the lubricant, the more uneven the film becomes and the sufficient durability cannot be obtained. Therefore, obtaining sufficient reliability is incompatible with increasing the density. Was.
本発明は、従来装置の上記欠点に鑑み、磁気記録媒体
の記録層とヘッドの記録あるいは読取部との距離を小さ
くすることなく、小さくした場合の効果と同一の効果を
発現させて実質的に高密度記録を実現させるとともに磁
気記録装置の信頼性を向上させることを目的とする。The present invention has been made in view of the above-described drawbacks of the conventional apparatus, and has substantially reduced the distance between the recording layer of the magnetic recording medium and the recording or reading unit of the head without reducing the distance. An object is to realize high-density recording and to improve the reliability of a magnetic recording device.
課題を解決するための手段 本発明は、磁気記録面の表面に磁性流体を塗布して磁
気記録媒体を構成し、記録読取用ヘッドと磁気記録媒体
表面を磁性流体を介して接触させて駆動することができ
るように構成したことにより、実質的に磁気記録媒体の
記録層とヘッドの記録あるいは読取部との距離を極端に
小さくすることなく、極端に小さくした場合の効果と同
一の効果を発現させて実質的に高密度記録を実現させる
とともに磁気記録装置の信頼性を向上させたことを特徴
とするものである。Means for Solving the Problems According to the present invention, a magnetic recording medium is formed by applying a magnetic fluid to the surface of a magnetic recording surface, and a recording / reading head and a magnetic recording medium surface are driven by contact with each other via the magnetic fluid. The distance between the recording layer of the magnetic recording medium and the recording or reading portion of the head is substantially reduced, and the same effect as when the distance is extremely reduced is realized. As a result, high-density recording is substantially realized, and the reliability of the magnetic recording apparatus is improved.
前記磁気記録媒体には、通常の磁気記録媒体はもちろ
ん、光磁気記録媒体も含まれる。又磁性流体としてはフ
ッ素系オイルと磁気微粒子とで構成されているものが好
適である。The magnetic recording medium includes not only a normal magnetic recording medium but also a magneto-optical recording medium. Further, as the magnetic fluid, a fluid composed of a fluorine-based oil and magnetic fine particles is preferable.
作 用 記録読取用ヘッドと磁気記録媒体表面を磁性流体を介
して接触させて駆動することにより、記録読取用ヘッド
と磁気記録媒体表面の磁界を流動性磁石で接続できるの
で、実質的に記録媒体の記録層とヘッドの記録あるいは
読取部を接触させた作用がある。従って、記録読取用ヘ
ッドと磁気記録媒体表面を接触させなくとも、ギャップ
を非常に狭くした場合と同一の効果があり、高密度記録
を達成でき、しかも磁気記録面の表面に磁性流体を塗布
して磁気記録媒体を構成しているので、磁気記録装置と
して通常のものを用いても上記作用を営むことができ
る。Operation By driving the recording / reading head and the surface of the magnetic recording medium in contact with each other via a magnetic fluid, the magnetic field on the recording / reading head and the surface of the magnetic recording medium can be connected by a fluid magnet. And the recording or reading portion of the head is brought into contact. Therefore, even if the recording / reading head does not come into contact with the surface of the magnetic recording medium, the same effect as when the gap is extremely narrowed can be obtained, high-density recording can be achieved, and a magnetic fluid is applied to the surface of the magnetic recording surface. Since the magnetic recording medium is formed by using the magnetic recording medium, the above-described operation can be performed even when a normal magnetic recording apparatus is used.
実施例 以下、本発明の一実施例を第１図〜第３図を用いて説
明する。Embodiment An embodiment of the present invention will be described below with reference to FIGS.
磁気記録媒体６は、第１図に示すように、磁気記録用
ディスク基板（媒体基体）１上にスパッタリング法等に
より磁気記録層２−（Fe−Ni、Ni−Co……等の磁性金属
や磁性金属酸化膜）を形成した後、表面にSiO2等の保護
膜３を形成してなるものである。この磁気記録媒体６の
表面に、スピンナー等でフッ素系オイルをベースとし、
磁性微粒子を混入してなる磁性流体４を所定の厚み（１
ミクロン以下が適当である）でコーティングする。As shown in FIG. 1, a magnetic recording medium 6 is formed on a magnetic recording disk substrate (medium base) 1 by a magnetic recording layer 2- (Fe-Ni, Ni-Co... After forming a magnetic metal oxide film, a protective film 3 such as SiO 2 is formed on the surface. On the surface of the magnetic recording medium 6, a fluorine-based oil is used as a base with a spinner or the like,
The magnetic fluid 4 containing the magnetic fine particles is mixed with a predetermined thickness (1
Submicron is appropriate).
一方、磁気記録ヘッド５の方にも、第２図に示すよう
に、ディッピング法で磁性流体４を塗布する。On the other hand, as shown in FIG. 2, the magnetic fluid 4 is also applied to the magnetic recording head 5 by a dipping method.
その後、第３図に示すようにディスクドライブ装置に
組込んで、記録読取用ヘッド５と磁気記録媒体６の表面
とを磁性流体４を介して接触させて駆動できるように調
整する。Thereafter, as shown in FIG. 3, it is incorporated in a disk drive device, and the recording / reading head 5 and the surface of the magnetic recording medium 6 are brought into contact with each other via the magnetic fluid 4 so as to be driven.
このような構成では、磁性流体４が滑材の働きをする
ので、記録読取用ヘッド５と磁気記録媒体６表面を磁性
流体４を介して接触させて駆動することが可能となっ
た。又記録読取用ヘッド５と磁気記録媒体６表面の磁界
を流動性磁石で接続できるので、実質的に記録媒体の記
録層とヘッドの記録あるいは読取部とを接触させたこと
と同様の効果が得られた。従って、記録読取用ヘッド５
と磁気記録媒体６表面とは接触していないが、記録読取
用ヘッド５のギャップを狭くするだけで、従来のフロッ
ピーディスク（20Mbit程度／直径3.5インチ）に比較
し、大幅な高密度記録（100Mbit/直径3.5インチ）が達
成できた。In such a configuration, since the magnetic fluid 4 functions as a lubricant, it is possible to drive the recording / reading head 5 by bringing the surface of the magnetic recording medium 6 into contact with the magnetic fluid 4. Further, since the magnetic field on the surface of the recording / reading head 5 and the surface of the magnetic recording medium 6 can be connected by a fluid magnet, substantially the same effect as when the recording layer of the recording medium is brought into contact with the recording or reading portion of the head can be obtained. Was done. Therefore, the recording and reading head 5
Is not in contact with the surface of the magnetic recording medium 6, but only by narrowing the gap of the recording / reading head 5, compared with a conventional floppy disk (about 20 Mbit / 3.5 inch diameter), has a much higher density recording (100 Mbit). /3.5 inches in diameter).
尚、使用する磁性流体４としては、フッ素系オイルを
ベースとする磁性流体以外にも、炭化水素系やSi系オイ
ルをベースとしたものも使用可能であったが、フッ素系
オイルをベースとする磁性流体を用いた場合が、最も耐
久性に優れていた。一方、磁性流体４の磁性微粒子とし
てはマグネタイトを用いたが、マグネタイトの粒度はヘ
ッドギャップ並みかそれ以下が望ましい。As the magnetic fluid 4 to be used, other than a magnetic fluid based on a fluorine-based oil, a fluid based on a hydrocarbon-based or Si-based oil could also be used. The durability was most excellent when the magnetic fluid was used. On the other hand, although magnetite was used as the magnetic fine particles of the magnetic fluid 4, the particle size of the magnetite is preferably equal to or less than the head gap.
又上記実施例では、磁気ディスク装置を例にして説明
したが、本発明と同様の構成で、磁気テープ、磁気カー
ド、更に媒体基体にPMMA等の透明体を用いた光磁気記録
媒体及びそれを用いた光記録装置に応用できることはい
うまでもない。In the above embodiment, the magnetic disk device has been described as an example.However, with the same configuration as the present invention, a magnetic tape, a magnetic card, and a magneto-optical recording medium using a transparent body such as PMMA as a medium substrate, and the same. It goes without saying that the present invention can be applied to the used optical recording apparatus.
例えば、光磁気記録装置を作成するためには、少なく
とも光照射光学系と光磁気記録読取用ヘッドと光磁気記
録媒体とから構成された光磁気記録装置において、媒体
基体としてPMMA等の透明な物質を用いた光磁気記録媒体
を作成しておけば容易に裏面より光ビームを照射でき、
一方、光磁気記録読取用ヘッドと光磁気記録媒体表面と
は、磁性流体を介して接触させて駆動させることが可能
なので光磁気記録装置でも高密度記録を達成できる。For example, in order to create a magneto-optical recording device, in a magneto-optical recording device including at least a light irradiation optical system, a magneto-optical recording / reading head, and a magneto-optical recording medium, a transparent material such as PMMA is used as a medium substrate. If you create a magneto-optical recording medium using, you can easily irradiate the light beam from the back,
On the other hand, the magneto-optical recording / reading head and the surface of the magneto-optical recording medium can be driven by being brought into contact with each other via a magnetic fluid, so that high-density recording can be achieved even with a magneto-optical recording apparatus.
発明の効果 本発明によれば、実質的に磁気記録媒体の記録層と記
録読取用ヘッドの記録あるいは読取部との距離を極端に
小さくすることなく、高密度記録を実現できるととも
に、磁気記録装置の信頼性を向上させることができる。According to the present invention, high-density recording can be realized without substantially reducing the distance between the recording layer of the magnetic recording medium and the recording or reading unit of the recording / reading head, and the magnetic recording apparatus can be realized. Can be improved in reliability.
第１図は本発明の一実施例の磁気記録媒体を示す断面
図、第２図はその記録読取用ヘッドを示す断面図、第３
図はその磁気記録装置を示す断面図である。 ４……磁性流体 ５……磁気記録ヘッド ６……磁気記録媒体FIG. 1 is a sectional view showing a magnetic recording medium according to an embodiment of the present invention, FIG. 2 is a sectional view showing the recording / reading head, and FIG.
The figure is a sectional view showing the magnetic recording device. 4 Magnetic fluid 5 Magnetic recording head 6 Magnetic recording medium
Claims (2)
いることを特徴とする磁気記録媒体。1. A magnetic recording medium wherein a magnetic fluid is applied to a surface of a magnetic recording surface.
構成されていることを特徴とする請求項１記載の磁気記
録媒体。2. The magnetic recording medium according to claim 1, wherein the magnetic fluid comprises a fluorine-based oil and magnetic fine particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2099708A JP2575225B2 (en) | 1990-04-16 | 1990-04-16 | Magnetic recording media |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2099708A JP2575225B2 (en) | 1990-04-16 | 1990-04-16 | Magnetic recording media |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03296902A JPH03296902A (en) | 1991-12-27 |
| JP2575225B2 true JP2575225B2 (en) | 1997-01-22 |
Family
ID=14254571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2099708A Expired - Fee Related JP2575225B2 (en) | 1990-04-16 | 1990-04-16 | Magnetic recording media |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2575225B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5663455A (en) * | 1979-10-30 | 1981-05-30 | Ricoh Co Ltd | Magnetic recording system |
| JPS63293719A (en) * | 1987-05-27 | 1988-11-30 | Hitachi Maxell Ltd | Magnetic recording medium |
| JPH0278016A (en) * | 1988-09-14 | 1990-03-19 | Sony Corp | Magnetic recording medium |
-
1990
- 1990-04-16 JP JP2099708A patent/JP2575225B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03296902A (en) | 1991-12-27 |
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